A heat pump based on the vapor-compression refrigeration cycle uses R-134a as the working fluid. The heat pump is used to heat a 1000 SCFM of air...
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A heat pump based on the vapor-compression refrigeration cycle uses R-134a as the
working fluid. The heat pump is used to heat a 1000 SCFM of air from 40 F to 90 F.
The condenser pressure is 160 psia, the evaporator pressure is 30 psia, and the
isentropic efficiency of the compressor is 85%.
a) Find the enthalpy of the R-134a exiting the compressor (answer: 122.98 Btu/lbm).
b) Find the coefficient of performance of the heat pump (answer: 4.22).
c) Find the power input required to drive the compressor (answer: 5.05 hp).
TIN = 40OF
1000 SCFM -
TOUT = 90OF
QCONDENSER
CO
Condenser
2
160 psia
Expansion
Compressor
WCOMPRESSOR
Valve
Evaporator
30 psia
QEVAPORATOR

Top Answer

As given below Use... View the full answer

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Jin
1000 SCFM
Tour
a) Refugerant from evapartor
is saturated vapor
Condense
For Ris ya table
160 psic
at 30 apsra , ( r, )
w
Valve
Saturahan tempT, = 15- 35 F
= 475-04 'n
Evaporator
Enthalpy h, =...

r1342.jpg

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